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If (1-p)(1+3x+9x^2+27 x^3+81 x^4+243 x^5...

If `(1-p)(1+3x+9x^2+27 x^3+81 x^4+243 x^5)=1-p^6,p!=1` , then the value of `p/x` is
a. `1/3` b. `3` c. `1/2` d. `2`

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